Mississippi Code Title 27. Taxation and Finance § 27-57-13

(1) For the purpose of determining the amount of his liability for the tax imposed herein, each distributor shall, not later than the twentieth day of the month next following the month in which this article becomes effective and not later than the twentieth day of each month thereafter, file with the department a monthly report which shall include a statement of the number of gallons of lubricating oil sold by such distributor within this state during the preceding calendar month and such other information as may be necessary for the proper administration of this article.

(2) At the time of filing each monthly report with the department, each distributor shall pay to the department the full amount of the lubricating oil tax due from such distributor for the preceding calendar month.

Reports and payments must be filed electronically by the due date in order to be considered timely filed, except when the due date falls on a weekend or holiday, in which case such reports and payments must be filed electronically by the first working day following the due date in order to be considered timely filed.

The monthly report of the distributor shall be prepared and filed with the department on forms prescribed by the department, or such distributor may, with the approval of the department, furnish the required information on machine-prepared schedules setting out such information as is prescribed on the forms furnished by the department. Such monthly reports shall be signed by the distributor in person or by his duly authorized agent and shall contain a declaration that the statements contained therein are true and are made under penalty of perjury.